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Bimetal Overload Thermal Protection for Three /Single Phase AC/DC Motor
Hi-Amp motor bimetal overload thermal protection switch are installed in motor circuits, and the current going to the motor passes through the bimetallic tripping element. The most salient feature of 17AM / KSD9700 / TB / 6AP/ 3MP/ 5AP series thermal overload switch / motor thermal protection switch is small volume and large current carrying capacity.
Hi-Amp motor bimetal overload thermal protection switch are installed in motor circuits, and the current going to the motor passes through the bimetallic tripping element. The flowing current heats the bimetallic strip which causes the bimetallic material to bend, and after a specific temperature, the bimetallic strip will open the thermal protection switch. The most salient feature of 17AM / KSD9700 / TB / 6AP/ 3MP/ 5AP series thermal overload switch / motor thermal protection switch is small volume and large current carrying capacity.
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17AM motor thermal overload protector switch |
6AP/ 3MP/ 5AP Window motor overload bimetal thermal cutoff switch |
3MP pre-set KLIXON snap action bimetal disc thermal protector switch |
High Light: motor Bimetal Overload Thermal Protection switch
thermo switch protector for floor heating
BW series thermal protector’s Principle and structure
BW series thermal protector is to use a certain geometry of bimetallic strip, without auxiliary institutions, only by bimetallic strip their own sense of mild heating current, rapid changes in the state of bimetallic element, direct drive contact automatic cutting and processing circuit, overheat protection, overload protection.
BW series thermal protector’s application
It is widely applied in Electric motors and electrical equipment as electric blanket, hot wall, washer motor, soybean milk machine motor, Fan motor, air condition motor, fractional motor, direct current motor, AC brushless motor, water pump, transformer, rectifier, lighting, rechargeable battery,electric heating appliance etc.
BW series thermal protector’s specification
1. Contact’s type: Normally closed and Normally open
2. Electrical rating: 10A/AC120V; 8A/AC250V; 10A/AC250V; 16A/AC250V
3. Circuit resistance: ≤50mΩ (Initial value)
4. Insulation resistance: ≥100mΩ
5. Action temperature range: 40~150℃
6. Case: metal case and plastic case
7. Life: ≥10,000 times
8. Size:
9. Open temperature and reset temperature sheet
| Model | L(mm) | W(mm) | H(mm) | Electrical rating | Lead wire (mm) |
| BW metal | 20 | 7.5 | 3.8 | 5A/250V;10A/250V | AWG#22,AWG#18 high temperature silicone wire L1=L2=70mm, or according to customer’s requirement. |
| 20 | 8.0 | 4.1 | 16A/250V | ||
| BW plastic | 20 | 8.0 | 4.0 | 5A/250V;10A/250V |
| Code | Open temp. | Reset temp. | Code | Open temp. | Reset temp. |
| 40 | 40℃±5℃ | ≥30℃ | 100 | 100℃±5℃ | 70±10℃ |
| 45 | 45℃±5℃ | ≥30℃ | 105 | 105℃±5℃ | 70±12℃ |
| 50 | 50℃±5℃ | ≥30℃ | 110 | 110℃±5℃ | 75±12℃ |
| 55 | 55℃±5℃ | ≥30℃ | 115 | 115℃±5℃ | 80±12℃ |
| 60 | 60℃±5℃ | 40±10℃ | 120 | 120℃±5℃ | 85±12℃ |
| 65 | 65℃±5℃ | 45±10℃ | 125 | 125℃±5℃ | 90±12℃ |
| 70 | 70℃±5℃ | 50±10℃ | 130 | 130℃±5℃ | 95±12℃ |
| 75 | 75℃±5℃ | 55±10℃ | 135 | 135℃±5℃ | 100±12℃ |
| 80 | 80℃±5℃ | 60±10℃ | 140 | 140℃±5℃ | 105±12℃ |
| 85 | 85℃±5℃ | 65±10℃ | 145 | 145℃±5℃ | 110±12℃ |
| 90 | 90℃±5℃ | 70±10℃ | 150 | 150℃±5℃ | 115±12℃ |
| 95 | 95℃±5℃ | 75±10℃ |
BW Thermal protector’s competitive advantage
1. Small size and easy installation
2. Quick bimetallic strip, fast reaction
3. The life time high than 10,000 times
4. Prevention again leak of vacuum impregnation process
5. Replacer of SENSATA 17AM 7AM, SEKI ST-22 etc.
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